Engine



Nov. 13, 1934. c. F. BACHLE 1,980,778

ENGINE Filed Oct. '7, 1931 INVENTOR.

ATTORNEY.

Patented Nov. 13, 1934 UNITED STATES ENGINE Carl F. Bachle, Detroit,

Mich., assignor to Continental Motors Corporation, Detroit, Mich., a

corporation of Virginia Application October 7, 1931, Serial No. 567,379

6 Claims.

This invention relates to internal combustion engines and refers more particularly to an improved fuel mixture distributing means for such engines.

I find that although my improved fuel mixture distributing means is Well adapted for use with engines in general, such as the poppet valve type, my invention has particular significance with engines of the sleeve valve type.

In engines and particularly in the sleeve valve type of engine it is customary to provide each cylinder with a plurality of spaced intake ports and such an arrangement gives rise to difficulties in efiiciently distributing the fuel mixture to the 'ports, especially with the usual fuel mixture sup- 'ply means.

It is an object of my invention to overcome the aforesaid diiliculties by providing a fuel mixture {supply means which will efliciently distribute the 20 fuel mixture to the various cylinders of the engine and to the ports of each cylinder.

Further objects and advantages of my invention will be apparent as the description of my invention progresses, reference being made to the accompanying drawing illustrating one embodiment of my invention in which:

Fig. l is a fragmentary side elevation view of the engine showing my fuel mixture supply means partly in section,

Fig. 2 is a vertical transverse sectional view along the line 22 of Fig. 1,

Fig. 3 is a detail transverse sectional view taken substantially on the line 3-3 of Fig. 1, and

Fig. 4 is a detail sectional View of a one piece cast manifold structure of modified construction.

Referring to the drawing, reference character A represents an internal combustion engine of the sleeve valve type, the particular engine shown for illustration being of the single sleeve type wherein each sleeve is given a combined reciprocation and oscillation with respect to the cylinder and sleeve axes by any well known operating means.

The engine A has a plurality of cylinders 11 each provided with one or more exhaust ports 12 and a plurality of intake ports 13, these cylinderv ports being controlled by the sleeve intake and exhaust ports 14 and 15 respectively. The cylinder block is provided with an intake 16 for :each intake chamber 17 which extends around a portion of the associated cylinder whereby the cylinder intake ports 13 are open to the chamber 17 which in turn is open to the chamber intake 16 at the side of the cylinder block or engine A.

Each cylinder is provided with a suitable cyl- 'of my invention in themselves.

inder head 18 and associated spark plug 19,

piston 20 and connecting rod 21 theseparts being well understood in the art and forming no part The engine cylinders are exhausted by ports 15, 12 and exhaust manifold 22.

My improved fuel mixture supply means consists, in the present embodiment, of a continuous intake manifold structure B having a riser 23 communicating with a carburetor 24 herein illustrated as the down draft type although the more common up draft type or other types may be employed if desired.

The manifold structure B is preferably constructed of primary and secondary sections 0 and D respectively which are separated longitudinally by a partition 25, said sections and intermediate partition preferably secured together by bolts or other fastening means 26 and cooperating to provide primary and secondary fuel distributing chambers or headers 27 and 28 extending generally parallel to each other, the secondary header 28 having port runner portions 29 adaptedfor registration with the various chamber intakes 16. The port runner portions are'preferably located generally below the secondary header 28.

It may be noted that the secondary header 28v is preferably located beneath the primary header 27, in order to obtain proper distribution of the wet fuel mixture, and said headers are preferably 5- arranged to communicate as will behereinafter described. The location of the communicating openings intermediate the headers maybe best determined by experiment whereby to balance the pressures at the outlets for obtaining the desired uniform distribution of the fuel mixture as well as the wet fuel precipitates that are deposited on the partition 25 forming the floor of the header 27. It may be noted that the fuel is thus passed generally downwardly from the primary header or conduit 27 to the port runners 29 which in the present embodiment of the invention communicate with a secondary header 28 that connects said conduit outlets with the port runners.

The intermediate partition 25 is preferably pro-' vided with holes 30 adjacent both ends providing passages for connecting the headers 2'7 and 28, and said partition is also preferably provided with a transverse hole or passage 31 located substantially at the middle of the manifold directly below theoutlet of the riser 23 for a purpose hereinafter made more apparent.

It will be observed that when a cylinder is drawing in fuel mixture, the fuel mixture is supplied from opposite directions in header 28 as no employed for placing shown by the arrows 32 thereby causing the fuel mixture to pass substantially symmetrically or uniformly into the intake chamber 17. However, in testing a manifold of this type having only passages or holes 30, it was noticed that the middle cylinders were starved. In order to remedy this condition and to provide a uniform distribution of the fuel mixture to the several cylinders I employed one or more holes or passages 31 or 31 intermediate the holes or passages 30. The size of the hole or holes 31 or 31 was determined to be in general of less cross-sectional area than the holes or passages 30. Thus, the middle cylinders were supplied with fuel mixture sufficient to prevent the same from being starved.

In the preferred construction'as illustrated by v Fig. 1, I found that a single hole 31 opposite the outlet of the riser 23 provided a very satisfactory distribution of the fuel mixture, though a construction as illustrated by Fig. 4 having a plurality of holes or passages 31' intermediate the passages 30 and arranged substantially as shown in Fig. 4 produced satisfactory results. Obviously, it will be understood that one or more passages may be. the, headers 27 and 28 in communication at points intermediate the. com municating passages at or near the ends of the manifold structure.

It will probably be desirable to construct the manifold ofa single casting as illustrated in Fig. 4 instead of providing a separate partition wall and the holes or passages in the partition may be cast or drilled as desired. Furthermore, I find it quite desirable in many instances to arrange the passages connecting the-headers 2'7 and 28 sym metrical about the centerof the manifold structure. It will be noted that these passages as shown in Fig. 4 are arranged symmetrical about the transverse plane containing the axis of the riser 23 2s is the case with the passages shown in Fig. 1. It will be understood, however, that I do not limit myself to such a symmetrical arrangementsince in someinstances I may desire to provide an unsymmetrical arrangement.

\ The-herein described structure provides an intake manifold substantially of the trombone type and it will be noted thatthe horizontally extending headers 27 and 28 are substantially paralleland havea common intermediate wall provided with. one or more holes 'or passages for providing intercommunication between the headers in order to supply substantially uniform distribution of the fuel mixtureto the engine cylinders.

Preferably, the. partion wallwhich forms the floor of the primary header 271s provided with a shallow groove or-depression 35 extending longitudinally of the header and serves to assist in the wet fuel mixture distribution.

1 It will be thus. noted that my improved fuel mixture distributing means provides for uniform distribution to thefengine cylinders, said means providing improved engine performance for engines having individual or separate means for conducting the fuel mixture to each cylinder. Such an arrangement as heretofore described may be efficiently utilized in sleeve valve-engines where individual fuel mixture inlets for each cylinder are quite desirable, and therefore though my invention has particular significance with not necessarilylimit aspects to use with a the principles of my sleeve valve engines I domy invention in its broad sleeve valve engine, -since or cylinders, a fuel ing a primary header and a secondary header,-

the latter extending generally longitudinally of .the engine and communicating with said intake ports, said headers having a common intermediate wall separating same and provided with passages for connecting the end portions of said headers, said wall having one or more passages for connecting said headers vin'tern'iediate'the end portions and provided with agroove extending longitudinally along the floor of the I primary header. I t

2. In an engine of the type having a plurality mixture conducting manifold structure having a fuel .distributingconduit provided with one or more openings in the bottom floor thereof and intermediate the ends thereof through which to distribute fuel mixture by V gravity to said cylinders.

3. An, intake manifold structure for a multicylinder engine including a fuel mixture conducting riser, a fuel distributing conduit communica ing with said riser and having one or more openings in the floor thereof and intermediate the ends thereof for passing fuel generally down-.

wardly to said engine cylinders.

4. An intake manifold structure for a multi cylinder engine including a fuel mixture conducting riser, a fuel distributing conduit communicating therewith and extending generally longitudinally of the engine, said conduit having spaced graduated openings in the fioorthereof for metering and passing fuel generally downwardly to said engine cylinders.

5. An intake manifold structure for a multicylinder engine including a fuel mixture conduct ing riser, a fuel distributing conduit commimicating therewith and extending generally longitudinally of the engine, portrunners individually communicating with the engine cylinders, and extending generally transverse to. said conduit,

and means intermediate the port runners and conduit and including one or more openings in the floor of the conduit intermediate the length of said conduit for conducting fuel generally downwardly from said conduit to the engine cyl-. inders.

6. An intake manifold structure for a mill ti respectively and extending generally transverse to said conduit, and means intermediate the engine including a fuel mixture. conport runners and conduit and including one or I more openings in the floor of the conduit spaced longitudinallybetween the ends thereof for conducting fuel generally downwardly from said conduit toward the engine cylinders.

r CARL F. BACHLE. 

